Trouble saving graphics

[Ed Scheinerman]

I'm using Sage 5.11 on a Mac

I've been used to creating graphs and then saving them as PDF's for inclusion in papers. Using code like this:

sage: g = graphs.PetersenGraph()

sage: pic = g.plot()

sage: pic.save('pete.pdf')

But now it just throws a bunch of errors:

---------------------------------------------------------------------------

AssertionError                            Traceback (most recent call last)

<ipython-input-56-d63f9d409a56> in <module>()

----> 1 pic.save('pete.pdf')

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/sage/misc/decorators.pyc in wrapper(*args, **kwds)

    456             kwds[self.name + "options"] = suboptions

    457 

--> 458             return func(*args, **kwds)

    459 

    460         #Add the options specified by @options to the signature of the wrapped

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/sage/plot/graphics.pyc in save(self, filename, **kwds)

   2753                 figure.savefig(filename, dpi=dpi, bbox_inches='tight',

   2754                     bbox_extra_artists=self._bbox_extra_artists,

-> 2755                     transparent=transparent)

   2756             else:

   2757                 figure.savefig(filename, dpi=dpi,

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/figure.pyc in savefig(self, *args, **kwargs)

   1368             kwargs.setdefault('edgecolor', rcParams['savefig.edgecolor'])

   1369 

-> 1370         self.canvas.print_figure(*args, **kwargs)

   1371 

   1372         if transparent:

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)

   2053                     orientation=orientation,

   2054                     dryrun=True,

-> 2055                     **kwargs)

   2056                 renderer = self.figure._cachedRenderer

   2057                 bbox_inches = self.figure.get_tightbbox(renderer)

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_pdf(self, *args, **kwargs)

   1846         from backends.backend_pdf import FigureCanvasPdf # lazy import

   1847         pdf = self.switch_backends(FigureCanvasPdf)

-> 1848         return pdf.print_pdf(*args, **kwargs)

   1849 

   1850     def print_pgf(self, *args, **kwargs):

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/backends/backend_pdf.py in print_pdf(self, filename, **kwargs)

   2299                                          width, height, image_dpi, RendererPdf(file, image_dpi),

   2300                                          bbox_inches_restore=_bbox_inches_restore)

-> 2301             self.figure.draw(renderer)

   2302             renderer.finalize()

   2303         finally:

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)

     52     def draw_wrapper(artist, renderer, *args, **kwargs):

     53         before(artist, renderer)

---> 54         draw(artist, renderer, *args, **kwargs)

     55         after(artist, renderer)

     56 

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/figure.pyc in draw(self, renderer)

   1004         dsu.sort(key=itemgetter(0))

   1005         for zorder, a, func, args in dsu:

-> 1006             func(*args)

   1007 

   1008         renderer.close_group('figure')

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)

     52     def draw_wrapper(artist, renderer, *args, **kwargs):

     53         before(artist, renderer)

---> 54         draw(artist, renderer, *args, **kwargs)

     55         after(artist, renderer)

     56 

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/axes.pyc in draw(self, renderer, inframe)

   2084 

   2085         for zorder, a in dsu:

-> 2086             a.draw(renderer)

   2087 

   2088         renderer.close_group('axes')

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)

     52     def draw_wrapper(artist, renderer, *args, **kwargs):

     53         before(artist, renderer)

---> 54         draw(artist, renderer, *args, **kwargs)

     55         after(artist, renderer)

     56 

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/collections.pyc in draw(self, renderer)

    693                     (np.sqrt(x) * self.figure.dpi / 72.0))

    694                 for x in self._sizes]

--> 695         return Collection.draw(self, renderer)

    696 

    697 class PolyCollection(Collection):

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)

     52     def draw_wrapper(artist, renderer, *args, **kwargs):

     53         before(artist, renderer)

---> 54         draw(artist, renderer, *args, **kwargs)

     55         after(artist, renderer)

     56 

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/collections.pyc in draw(self, renderer)

    257             offsets, transOffset, self.get_facecolor(), self.get_edgecolor(),

    258             self._linewidths, self._linestyles, self._antialiaseds, self._urls,

--> 259             self._offset_position)

    260 

    261         gc.restore()

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/backends/backend_pdf.py in draw_path_collection(self, gc, master_transform, paths, all_transforms, offsets, offsetTrans, facecolors, edgecolors, linewidths, linestyles, antialiaseds, urls, offset_position)

   1546             output(1, 0, 0, 1, dx, dy, Op.concat_matrix, path_id, Op.use_xobject)

   1547             lastx, lasty = xo, yo

-> 1548         output(*self.gc.pop())

   1549 

   1550     def draw_markers(self, gc, marker_path, marker_trans, path, trans, rgbFace=None):

/Users/ers/share/sage-5.11/local/lib/python2.7/site-packages/matplotlib/backends/backend_pdf.py in pop(self)

   2091 

   2092     def pop(self):

-> 2093         assert self.parent is not None

   2094         self.copy_properties(self.parent)

   2095         self.parent = self.parent.parent

AssertionError: 

[P Purkayastha]

It seems saving to pdf is broken on sage-5.10 onwards. Works till
sage-5.9. The problem is only in graphs. Normal plots work fine.

I have opened http://trac.sagemath.org/ticket/15173 to track this.

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[Ed Scheinerman]

I found a temporary workaround. Save as .eps (which works fine) and then use epstopdf to convert to .pdf. 

[Nathann Cohen]

I have opened http://trac.sagemath.org/ticket/15173 to track this.

http://trac.sagemath.org/ticket/15116

Nathann